Screenshots

live presentation 1 (279 kB) - download tags and rename
live presentation 2 (226 kB) - fill missing tags

TigoTago albums view TigoTago tracks view

Dircectory / file name column and pop menu available on each cell. Directory navigation is in a 'Commander's style:
popup menu

inplace editor on each cell like in a spreadsheet,
preview changed cells before save to disk (orange),
convenient multi-select (blue):
grid multi-selection and preview changes

complete set of operations on tags:
tags operations

More screens available in the Help.